82-70 sweep motor problem

[Beowulf]

I got a machine that the sweep motor keeps overheating on. We have westinghouse 220 combos. We replaced the motor and gearbox and it still did it. I pulled it all apart and the sweep moves really smooth by hand. I pulled the shaft and self-aligning bearing off and the bearing wouldn't self-align. It was frozen. It would turn good but wouldn't move in it's socket. I freed it up and greased it good, put it all back together and it ran good for two hours on auto-cycle. but the motor is still getting way too hot. It feels like it's on the virge of shutting off. Oh and I don't know if this makes any difference but the sweep got hit with a 15 pounder about two days before it started messing up. The shaft looked straight though. Anybody seen this before? Can anyone help me? [img]/content/btubb/images/%%GRAEMLIN_URL%%/confused.gif[/img]

[JimDorsin]

Re: 82-70 sweep motor problem

Sounds like your windings are not switching from start to run. What type of start switch are you employing? Do you have the orignal Cent switch and Mech? or a SS perhaps?

and when you say 220, you dont mean 220 volts in Ga, do ya?

[Beowulf]

Re: 82-70 sweep motor problem

We got SS start switches. no they are 110. I don't know what I was thinking. It's been a long weekend.

[JimDorsin]

Re: 82-70 sweep motor problem

ok, not in the motor or gearbox. Did you use the same ss switch? If so, try swaping that with a known good one, they are netourious for going bad (we have ours on plugs, yours are probably hard wired, if so, a new one went with the new motor)

Pull up the wire way and make sure nothing is shorting 2 terminals.

Check the C-1 plug pins, 3rd row is where most of your sweep pins are.

Thereis a few things to look at, let us know if you have any luck.

Paul

[JimDorsin]

Re: 82-70 sweep motor problem

incidently, very rarly will a sweep getting hammered cause a problem. If you dont feel any binding when you crank by hand, you should be ok. (run it all the way through with the crank, just incase there is only 1 specefic area it binds)

They get hit all the time, the shock mounts save anything expencive.

[Rep]

Re: 82-70 sweep motor problem

Did ya check the sweep capacitors in the wireway? They'll cause motors to overheat and act up sometimes. Just a thought

[KrAzYGoD]

Re: 82-70 sweep motor problem

check the sweep capacitors in the wireway

[Beowulf]

Re: 82-70 sweep motor problem

I'll check that today. Tues. is my day off.

[BowlEquip]

Re: 82-70 sweep motor problem

Some signs to look for:

Start winding staying on with run winding (bad SS start switch or inductive relay) - - motor will sound louder than usual while running.

Bad capacitor(s) - - Sweep may start up slowly and gain speed.

In both cases above, you'll usually have a certain degree of coasting or drifting at the stops.

Good Luck, and HAPPY THANKSGIVING!!

[Beowulf]

Re: 82-70 sweep motor problem

Okay, I had a bad "T" pin on the c-1 female side. I replaced it and both capacitors just to be sure(although I don't think the caps were bad.) When the sweep and table are both returning to the home position, the sweep is dragging, for lack of a better word. You can hear the motor having a hard time lifting the sweep. But when you operate just the sweep or when the table returns just before the sweep, it works fine. It's like both motors running at the same time is causing a strain on power or something. It doesn't do it on the other machines. I checked it for binding though. it all seems to be moving freely. And it runs through the pin deck fine. It only does it from guard to home. And HAPPY THANKSGIVING. I had to eat my thanksgiving dinner at work today.

[John_Galt]

Re: 82-70 sweep motor problem

How about a cruddy/loose connection in the russell-stoll plug? Could take it apart and check it out just to see. Just a guess.

[30n70]

Re: 82-70 sweep motor problem

I have some ss start switches that will not start the motor under load(Guard to zero is the only time it really starts with a load). You can use them as a table motor, or scrap the switch

[felix]

Re: 82-70 sweep motor problem

Rotating Switch Needs To Be Raised Carefuly and Ice Picked Higher On The Shaft.... [img]/content/btubb/images/%%GRAEMLIN_URL%%/wink.gif[/img]

[Andrew]

Re: 82-70 sweep motor problem

Does the sweep reverse happily? I.e. run it to 66 (then press the zero/stepper button to stop it cycling), then try reversing it back to 0 (as if you were resetting after an offspot).

This might indicate a faulty start winding circuit in the machine.

Try swapping the chassis too (to eliminate contactors and the portion of the circuit inside the chassis).

Another possibility might be that the start and run windings are switched around (in the motor plug machine side, the C1 plug, or on the contactors in the chassis). Has any of that wiring been touched recently?

Andrew.

[peapodd@mindspring.com]

Re: 82-70 sweep motor problem

Still lookin' Huh?
Perhaps-
Yank Chassis-
Unscrew 'Shorty'wireway cover below chassis rest area-then look DEAD LEFT-all the WAY left to the point where You'll see a JUMPER wire conecting one terminal strip to the opposing strip.
It's a tiny-yet-bulky-wirw that somtimes shoits da sheets.
Majority of Amps may've finally got attn.through this jump/connection
Lettuce know...
FATTY